An SMTP relay is a service that forwards email from your application, website, or server to recipients through a provider's authenticated sending infrastructure, instead of your own mail server. It is how apps reliably send transactional and bulk email at volume without hitting spam folders or sending limits.
How an SMTP relay works
Your app connects to the provider's SMTP server with credentials, hands off each message, and the relay authenticates, sends, and tracks it — managing IP reputation and deliverability for you. Mailpro's SMTP sending server does exactly this; see how to send emails with an SMTP server and how to check your SMTP connection.
When to use one
Use an SMTP relay for password resets, receipts, notifications, and any app-generated mail that must arrive reliably. Read factors to verify before choosing an SMTP server. Related: SMTP and transactional email.
Mailpro and SMTP
Relay your app's email through Swiss infrastructure
Point your app at Mailpro's authenticated SMTP and let reputation and deliverability be handled for you.